Composite image of supernova remnant G54.1+0.3 including radio, infrared and X-ray light. The yellow point indicates a strong X-ray source at the centre of the supernova remnant. This is a dense object called a neutron star, which can form as a star runs out of fuel, and material collapses down on to the star's core. G54.1+0.3 contains a special type of neutron star called a pulsar, which emits particularly bright radio and X-ray emissions. The blue and green emissions show the presence of dust, including silica. The red in the image correspond to radio data from the Karl G. Jansky Very Large Array; green corresponds to 70 micrometre wavelength infrared light from the European Space Agency's Herschel Space Observatory; blue corresponds to 24 micrometre wavelength infrared light from the Multiband Imaging Photometer (MIPS) instrument on NASA's Spitzer Space Telescope; yellow corresponds to X-ray data from the Chandra X-ray Observatory.